Buggy code:
public class StandardJMeterEngine implements Runnable , JMeterEngine , JMeterThreadMonitor { private static final Logger log = LoggingManager . getLoggerForClass ( ) ; private static final long serialVersionUID = 233L ; private static final long WAIT_TO_DIE = 5 * 1000 ; private final Map allThreads ; private volatile boolean startingGroups ; private volatile boolean running = false ; private volatile boolean serialized = false ; private HashTree test ; private volatile SearchByClass testListenersSave ; private final String host ; private static final boolean exitAfterTest = JMeterUtils . getPropDefault ( "server.exitaftertest" , false ) ; private static final boolean startListenersLater = JMeterUtils . getPropDefault ( "jmeterengine.startlistenerslater" , true ) ; private static Map allThreadNames ; private static volatile StandardJMeterEngine engine ; private static Map allThreadsSave ; public static void stopEngineNow ( ) { } public static void stopEngine ( ) { } private static final List testList = new ArrayList ( ) ; public static synchronized void register ( TestListener tl ) { } public static boolean stopThread ( String threadName ) { } public static boolean stopThreadNow ( String threadName ) { } private static boolean stopThread ( String threadName , boolean now ) { } public StandardJMeterEngine ( ) { } public StandardJMeterEngine ( String host ) { } public void configure ( HashTree testTree ) { } private static class MyThreadGroup extends ThreadGroup { public MyThreadGroup ( String s ) { } public void uncaughtException ( Thread t , Throwable e ) { } } public void runTest ( ) throws JMeterEngineException { } private void removeThreadGroups ( List elements ) { } private void notifyTestListenersOfStart ( SearchByClass testListeners ) { } private void notifyTestListenersOfEnd ( SearchByClass testListeners ) { <START_BUG> StandardJMeterEngine . log . info ( "Notifying<seq2seq4repair_space>test<seq2seq4repair_space>listeners<seq2seq4repair_space>of<seq2seq4repair_space>end<seq2seq4repair_space>of<seq2seq4repair_space>test" , new Throwable ( ) ) ; <END_BUG> Iterator iter = testListeners . getSearchResults ( ) . iterator ( ) ; while ( iter . hasNext ( ) ) { TestListener tl = ( ( TestListener ) ( iter . next ( ) ) ) ; try { if ( ( host ) == null ) { tl . testEnded ( ) ; } else { tl . testEnded ( host ) ; } } catch ( Exception e ) { StandardJMeterEngine . log . warn ( ( "Error<seq2seq4repair_space>encountered<seq2seq4repair_space>during<seq2seq4repair_space>shutdown<seq2seq4repair_space>of<seq2seq4repair_space>" + ( tl . toString ( ) ) ) , e ) ; } } StandardJMeterEngine . log . info ( "Test<seq2seq4repair_space>has<seq2seq4repair_space>ended" ) ; if ( ( host ) != null ) { long now = System . currentTimeMillis ( ) ; System . out . println ( ( ( ( ( ( ( "Finished<seq2seq4repair_space>the<seq2seq4repair_space>test<seq2seq4repair_space>on<seq2seq4repair_space>host<seq2seq4repair_space>" + ( host ) ) + "<seq2seq4repair_space>@<seq2seq4repair_space>" ) + ( new Date ( now ) ) ) + "<seq2seq4repair_space>(" ) + now ) + ")" ) ) ; if ( StandardJMeterEngine . exitAfterTest ) { exit ( ) ; } } } private ListedHashTree cloneTree ( ListedHashTree tree ) { } public void reset ( ) { } public synchronized void threadFinished ( JMeterThread thread ) { } public synchronized void stopTest ( ) { } public synchronized void stopTest ( boolean b ) { } private class StopTest implements Runnable { private final boolean now ; private StopTest ( boolean b ) { } public void run ( ) { } } public void run ( ) { } private void scheduleThread ( JMeterThread thread , ThreadGroup group ) { } private boolean verifyThreadsStopped ( ) { } private void tellThreadsToStop ( ) { } public void askThreadsToStop ( ) { } public void askThreadsToStopNow ( ) { } private void stopAllThreads ( ) { } public void exit ( ) { } public void setProperties ( Properties p ) { } }

Fix:
StandardJMeterEngine . log . info ( "Notifying<seq2seq4repair_space>test<seq2seq4repair_space>listeners<seq2seq4repair_space>of<seq2seq4repair_space>end<seq2seq4repair_space>of<seq2seq4repair_space>test" ) ;